LED display screen flatness detection device

Abstract

The utility model belongs to the technical field of flatness detection, and particularly relates to an LED display screen flatness detection device which comprises a servo motor, a bidirectional screw rod is installed at the output end of the servo motor, sliding grooves are formed in the top side of a fixing frame, and sliding blocks are installed in the sliding grooves in a sliding mode. A plurality of limiting rollers are installed in the L-shaped plate at equal intervals through pin shaft matching, a sliding rod is installed in one side of the L-shaped plate in a sliding and penetrating mode, a limiting block is fixedly connected to one end of the sliding rod, an electrode slice is installed on the outer side of the limiting block, and an electrode plate is installed on the outer wall of the limiting rod. The servo motor is started, the sliding rod is close to and makes contact with the side wall of the display screen, and the sliding rod slides in the L-shaped plate. When the electrode plate is not tangent to the outer cambered surface of the electrode plate, the limiting roller makes contact with the side wall of the display screen to reach a proper position, and the control panel controls the servo motor to stop, so that the display screen is conveyed in a limited mode and prevented from deviating, and meanwhile the situation that the detection effect of the display screen is affected due to excessive limiting of the display screen can be prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of flatness detection, in particular to a flatness detection device for an LED display screen. Background Technique

[0002] An LED display screen is a display screen that displays various information such as text and graphics by controlling the display mode of semiconductor light-emitting diodes. During its production process, in order to ensure the quality of the display screen, flatness detection operations need to be carried out, so a flatness detection device is required.

[0003] A Chinese patent with the authorization announcement number CN115265462A discloses a screen edge flatness detection device for computer display production, including a conveyor belt; both sides of the conveyor belt are installed with first support plates, and the conveyor belt and the first support plates are rotationally connected through first connecting rods. Through the mutual cooperation of the set fixing mechanism and sliding mechanism, when it is necessary to detect the four peripheral edges of the display screen at one time, the rotation of the connecting block drives the rotation of the second fixing plate, and the rotation of the second fixing plate drives the display screen to rotate, facilitating the detection head to detect the four sides of the display, improving the detection efficiency.

[0004] However, the above flatness detection device still has some problems. In actual application, when performing limit conveying operations on the display screen, it is not possible to prevent the phenomenon of excessive limitation. Excessive limitation will cause local deformation on the surface of the display screen, affecting the detection efficiency of the display screen; therefore, a flatness detection device for an LED display screen is proposed for the above problems. Content of the Utility Model

[0005] In order to make up for the deficiencies of the prior art and solve the problems raised in the background technique, the utility model proposes a flatness detection device for an LED display screen.

[0006] The technical solution adopted by the present utility model to solve its technical problems is as follows: An LED display flatness detection device of the present utility model includes a support frame. One end of the top side of the support frame is provided with a fixed frame. One side of the fixed frame is provided with a servo motor. The output end of the servo motor is provided with a bidirectional lead screw. The bidirectional lead screw, the inner part of the top side of the fixed frame is provided with a chute. Sliders are slidably installed inside the chutes. Screw holes are opened inside the sliders. One end of the bidirectional lead screw penetrates through the screw holes and is rotatably installed on the inner wall of one side of the fixed frame. L-shaped plates are installed on the bottom sides of the sliders. A number of limiting rollers are equidistantly installed inside the L-shaped plates through pin shafts. A slide bar is slidably penetrated and installed between two limiting rollers inside one side of the L-shaped plate. One end of the slide bar is fixedly connected with a limiting block. An electrode piece is installed on the outer side of the limiting block. A first spring is fixedly connected between the limiting block and the L-shaped plate. The first spring is sleeved on the outer wall of the slide bar. A limiting rod is installed on one side of the L-shaped plate. An electrode plate is installed on the outer wall of the limiting rod, which realizes the limiting and conveying of the display screen to prevent its deviation, and at the same time can prevent excessive limiting of the display screen and affect the detection effect of the display screen.

[0007] Preferably, rotating shafts are rotatably installed between both sides of both ends of the support frame. Rotating rollers are installed on the outer walls of the rotating shafts. A conveyor belt is jointly installed in cooperation with the outer sides of the rotating rollers. A conveying motor is installed on one side of the support frame. One end of the rotating shaft is in cooperative connection with the output end of the conveying motor. The bottom sides of the limiting rollers are in contact with but not connected to the conveyor belt, which realizes the continuous conveying and detection of the display screen and improves the detection efficiency.

[0008] Preferably, an installation frame is installed on the top side of the support frame. A cylinder is installed on the top side of the installation frame. A support plate is installed on the bottom side of the cylinder. A number of groups of detection components are equidistantly installed on the bottom side of the support plate, which can adjust the height of the detection wheels according to the thickness of the display screen to ensure the detection accuracy.

[0009] Preferably, the detection assembly includes a plurality of sleeves, all of which are installed on the bottom side of the support plate. A first pressure sensor and a second pressure sensor are respectively installed on the inner walls of the top side and the bottom side of the sleeve. The second pressure sensor is annular. A movable rod is movably installed through the second pressure sensor at the bottom side of the sleeve. A connecting block is installed on the top side of the movable rod. Both the first pressure sensor and the second pressure sensor are used to monitor whether the connecting block generates pressure on the first pressure sensor and the second pressure sensor. An installation seat is installed on the bottom side of the movable rod. A detection wheel is installed inside the installation seat through pin shaft cooperation. A second spring is fixedly connected between the installation seat and the sleeve. The second spring is sleeved on the outer wall of the movable rod. A plurality of warning lights matching the detection assembly are equidistantly installed on one side of the support plate. The detection wheel is made of hollow rubber material, and the elastic coefficient of the second spring is large. When an uneven position is detected, the warning light will issue an alarm in time to remind the operator to handle it, improving the accuracy of the detection operation.

[0010] Preferably, the outer arc surface of the electrode plate is tangent to the outer arc surface of the electrode piece. The length of the electrode piece is much smaller than the length of the electrode plate. When the outer arc surfaces of the electrode plate and the electrode piece are not tangent, the operation of the servo motor stops, and the servo motor is automatically turned off.

[0011] Preferably, a control panel is installed on one side of the support frame. The control panel is electrically connected to the electrode piece, the electrode plate, the servo motor, the first pressure sensor, the second pressure sensor, and the warning light. It is used for signal transmission of the electrode piece, the electrode plate, the first pressure sensor, and the second pressure sensor, as well as operation control of the servo motor and the warning light, realizing automatic control of the entire detection device and improving the detection efficiency.

[0012] The beneficial effects of the present utility model are as follows:

[0013] 1. When the present utility model starts the servo motor, the sliding rod gradually approaches and contacts the side wall of the display screen. The sliding rod slides inside the L-shaped plate, thereby driving the electrode piece to move along the electrode plate. When the outer arc surfaces of the electrode plate and the electrode piece are not tangent, it indicates that the outer side of the limiting roller contacts the side wall of the display screen at a suitable position. At this time, the control panel controls the servo motor to stop operating, realizing the limit feeding of the display screen, preventing its deviation, and at the same time preventing excessive limiting of the display screen, which affects the detection effect of the display screen;

[0014] 2. When the present utility model detects a raised position on the display screen, the detection wheel is squeezed, the second spring is compressed, the movable rod drives the connecting block to move upward, so that the connecting block contacts the first pressure sensor. At this time, the warning light at this position lights up. When a sunken position on the display screen is detected, under the action of the gravity of the detection wheel, the movable rod drives the connecting block to move downward, the second spring is stretched, so that the connecting block contacts the second pressure sensor. At this time, the warning light at this position lights up, ensuring the detection accuracy and improving the precision of the detection operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0016] Figure 1 Isometric perspective structural schematic diagram of the present utility model;

[0017] Figure 2 Is the main structural schematic diagram of the flatness detection device;

[0018] Figure 3 Is the schematic diagram of the display screen limiting and conveying structure;

[0019] Figure 4 Is the schematic diagram of the trigger component structure;

[0020] Figure 5 Is the schematic diagram of the detection component structure.

[0021] In the figure: 1, support frame; 2, fixed frame; 3, servo motor; 4, bidirectional lead screw; 5, chute; 6, slider; 7, L-shaped plate; 8, limiting roller; 9, slide bar; 10, limiting block; 11, electrode piece; 12, first spring; 13, limiting rod; 14, electrode plate; 15, rotating shaft; 16, rotating roller; 17, conveyor belt; 18, conveying motor; 19, mounting frame; 20, cylinder; 21, support plate; 22, sleeve; 23, first pressure sensor; 24, second pressure sensor; 25, movable rod; 26, connecting block; 27, mounting seat; 28, detection wheel; 29, second spring; 30, warning light; 31, control panel. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0023] Please refer to Figures 1-4 As shown, a flatness detection device for an LED display screen includes a support frame 1. One end of the top side of the support frame 1 is provided with a fixed frame 2. One side of the fixed frame 2 is provided with a servo motor 3. The output end of the servo motor 3 is provided with a bidirectional lead screw 4. For the bidirectional lead screw 4, a chute 5 is opened inside the top side of the fixed frame 2. Sliders 6 are slidably installed inside the chute 5. Screw holes are opened inside the sliders 6. One end of the bidirectional lead screw 4 penetrates through the screw holes and is rotatably installed on the inner wall of one side of the fixed frame 2. L-shaped plates 7 are installed on the bottom sides of the sliders 6. A number of limiting rollers 8 are equidistantly installed inside the L-shaped plates 7 through pin shafts. A slide bar 9 is slidably penetrated and installed inside one side of the L-shaped plate 7 between two limiting rollers 8. One end of the slide bar 9 is fixedly connected with a limiting block 10. An electrode piece 11 is installed on the outer side of the limiting block 10. A first spring 12 is fixedly connected between the limiting block 10 and the L-shaped plate 7. The first spring 12 is sleeved on the outer wall of the slide bar 9. A limiting rod 13 is installed on one side of the L-shaped plate 7. An electrode plate 14 is installed on the outer wall of the limiting rod 13. The outer arc surface of the electrode plate 14 is tangent to the outer arc surface of the electrode piece 11. The length of the electrode piece 11 is much smaller than the length of the electrode plate 14. A control panel 31 is installed on one side of the support frame 1. During operation, in practical applications, when performing a limiting conveying operation on the display screen, it is impossible to prevent the phenomenon of excessive limiting. Excessive limiting will cause local deformation on the surface of the display screen, affecting the detection efficiency of the display screen. First, the operator places the display screen on the top side of the conveyor belt 17, starts the servo motor 3 through the control panel 31, drives the bidirectional lead screw 4 to rotate, makes the slider 6 move inside the chute 5, so that the L-shaped plate 7 and the limiting rollers 8 move accordingly, makes the limiting rollers 8 gradually approach the side wall of the display screen, and the slide bar 9 also gradually approaches and contacts the side wall of the display screen. As the servo motor 3 continues to operate, the slide bar 9 slides inside the L-shaped plate 7, and the first spring 12 is stretched, thereby driving the electrode piece 11 to move along the electrode plate 14. When the outer arc surfaces of the electrode plate 14 and the electrode piece 11 are no longer tangent, the outer side of the limiting roller 8 contacts the side wall of the display screen at a suitable position. At this time, the signals of the electrode piece 11 and the electrode plate 14 are transmitted to the control panel 31, and the control panel 31 controls the servo motor 3 to stop operating, realizing the limiting conveying of the display screen, preventing it from shifting, and at the same time being able to prevent excessive limiting of the display screen and affecting the detection effect of the display screen.

[0024] Please refer to Figure 1 、 2 、as shown in Figure 5, rotating shafts 15 are rotatably installed between both sides at both ends of the support frame 1. A rotating roller 16 is installed on the outer wall of the rotating shaft 15. A conveyor belt 17 is jointly installed in cooperation with the outer sides of the rotating rollers 16. A conveyor motor 18 is installed on one side of the support frame 1. One end of the rotating shaft 15 is in cooperative connection with the output end of the conveyor motor 18. Among them, the bottom side of the limiting roller 8 is in contact with but not connected to the conveyor belt 17;

[0025] An installation frame 19 is installed on the top side of the support frame 1. A cylinder 20 is installed on the top side of the installation frame 19. A support plate 21 is installed on the bottom side of the cylinder 20. A number of groups of detection components are equidistantly installed on the bottom side of the support plate 21. The detection components include a number of sleeves 22. The sleeves 22 are all installed on the bottom side of the support plate 21. A first pressure sensor 23 and a second pressure sensor 24 are respectively installed on the inner walls of the top side and the bottom side of the sleeve 22. Among them, the second pressure sensor 24 is annular. A movable rod 25 is movably installed through the second pressure sensor 24 at the bottom side of the sleeve 22. A connecting block 26 is installed on the top side of the movable rod 25. Both the first pressure sensor 23 and the second pressure sensor 24 are used to monitor whether the connecting block 26 generates pressure on the first pressure sensor 23 and the second pressure sensor 24. A mounting seat 27 is installed on the bottom side of the movable rod 25. A detection wheel 28 is installed in the mounting seat 27 through a pin in cooperation. A second spring 29 is fixedly connected between the mounting seat 27 and the sleeve 22. The second spring 29 is sleeved on the outer wall of the movable rod 25. A number of warning lights 30 that are matched with the detection components are equidistantly installed on one side of the support plate 21. The detection wheel 28 is made of hollow rubber material, and the elastic coefficient of the second spring 29 is large; During operation, in the production process of the LED display screen, in order to ensure the quality of the display screen, a flatness detection operation is required. Therefore, a flatness detection device needs to be used. Start the conveyor motor 18. The output end of the conveyor motor 18 drives the rotating shaft 15 and the rotating roller 16 to rotate, so that the conveyor belt 17 operates, and the display screen placed on it is conveyed forward, realizing continuous conveying and detection of the display screen, and improving the detection efficiency;

[0026] When the display screen is transported to the detection position on the conveyor belt 17, the cylinder 20 is started, and the cylinder 20 drives the support plate 21 to move downward, and the detection component descends accordingly, and the detection wheel 28 contacts the surface of the display screen. At this time, the distance between the connecting block 26 and the pressure sensor 1 23 and the pressure sensor 2 24 is the same. When a convex position is detected on the display screen, the detection wheel 28 is squeezed, the spring 29 is compressed, and the movable rod 25 drives the connecting block 26 to move upward, so that the connecting block 26 contacts the pressure sensor 1 23. At this time, the warning light 30 corresponding to the position lights up. When it is detected that the display screen has a convex position, the detection wheel 28 is squeezed, the spring 29 is compressed, and the movable rod 25 drives the connecting block 26 to move upward, so that the connecting block 26 contacts the pressure sensor 1 23. At this time, the warning light 30 corresponding to the position lights up. When the display screen has a recessed position, under the action of gravity of the detection wheel 28, the movable rod 25 drives the connecting block 26 to move downward, and the spring 29 is stretched, so that the connecting block 26 contacts with the pressure sensor 24. At this time, the warning light 30 at the recessed position lights up to remind the operator to take action, thereby adjusting the height of the detection wheel 28 according to the thickness of the display screen, ensuring the accuracy of detection and improving the accuracy of detection operations. The models of the pressure sensor 1 23 and the pressure sensor 2 24 are HSC-SSL-015PG2A3 and MPX5700DP respectively.

[0027] Working principle: First, the operator places the display screen on the top side of the conveyor belt 17, and starts the servo motor 3 through the control panel 31, driving the bidirectional screw 4 to rotate, so that the slider 6 moves in the slide groove 5, so that the L-shaped plate 7 and the limiting roller 8 move accordingly, so that the limiting roller 8 gradually approaches the side wall of the display screen, and the slide bar 9 also gradually approaches and contacts the side wall of the display screen. As the servo motor 3 continues to operate, the slide bar 9 slides inside the L-shaped plate 7, and the spring 12 is stretched, thereby driving the electrode plate 11 to move along the electrode plate 14. When the electrode plate 14 is not tangent to the outer arc surface of the electrode plate 11, it means that the outer side of the limiting roller 8 contacts the side wall of the display screen to reach a suitable position. At this time, the signals of the electrode plate 11 and the electrode plate 14 are transmitted to the control panel 31, and the control panel 31 controls the servo motor 3 to stop operating, thereby realizing the limited conveying of the display screen to prevent it from shifting, and at the same time, it can prevent the display screen from being excessively limited, affecting the detection effect of the display screen;

[0028] The conveying motor 18 is started to drive the rotating shaft 15 and the rotating roller 16 to rotate, so that the conveying belt 17 is operated to convey the display screen placed thereon forward, thereby realizing continuous conveying detection of the display screen and improving detection efficiency;

[0029] When the display screen is transported to the detection position on the conveyor belt 17, the cylinder 20 is started, and the cylinder 20 drives the support plate 21 to move downward, and the detection component drops accordingly, and the detection wheel 28 contacts the surface of the display screen. At this time, the distance between the connecting block 26 and the pressure sensor 1 23 and the pressure sensor 2 24 is the same. When a convex position is detected on the display screen, the detection wheel 28 is squeezed, the spring 29 is compressed, and the movable rod 25 drives the connecting block 26 to move upward, so that the connecting block 26 contacts the pressure sensor 1 23. At this time, the warning light 30 corresponding to the position lights up. When a concave position is detected on the display screen, under the action of the gravity of the detection wheel 28, the movable rod 25 drives the connecting block 26 to move downward, and the spring 29 is stretched, so that the connecting block 26 contacts the pressure sensor 2 24. At this time, the warning light 30 at the concave position lights up, reminding the operator to take action, thereby realizing the adjustment of the height of the detection wheel 28 according to the thickness of the display screen, ensuring the accuracy of the detection, and improving the accuracy of the detection operation.

[0030] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0031] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. An LED display flatness detection device, characterized in that: It includes a support frame (1). One end of the top side of the support frame (1) is installed with a fixed frame (2). One side of the fixed frame (2) is installed with a servo motor (3). The output end of the servo motor (3) is installed with a bidirectional lead screw (4). For the bidirectional lead screw (4), a chute (5) is opened inside the top side of the fixed frame (2). Sliders (6) are slidably installed inside the chute (5). Screw holes are opened inside the sliders (6). One end of the bidirectional lead screw (4) penetrates through the screw hole and is rotatably installed on the inner wall of one side of the fixed frame (2). L-shaped plates (7) are installed on the bottom sides of the sliders (6). A number of limiting rollers (8) are equidistantly installed inside the L-shaped plates (7) through pin shafts. A slide rod (9) is slidably penetrated and installed between two limiting rollers (8) inside one side of the L-shaped plate (7). One end of the slide rod (9) is fixedly connected with a limiting block (10). An electrode sheet (11) is installed on the outer side of the limiting block (10). A first spring (12) is fixedly connected between the limiting block (10) and the L-shaped plate (7). The first spring (12) is sleeved on the outer wall of the slide rod (9). A limiting rod (13) is installed on one side of the L-shaped plate (7). An electrode plate (14) is installed on the outer wall of the limiting rod (13).

2. The flatness detection device for an LED display screen according to claim 1, wherein: Rotating shafts (15) are rotatably installed between both sides of both ends of the support frame (1). Rotating rollers (16) are installed on the outer walls of the rotating shafts (15). A conveyor belt (17) is jointly installed in cooperation with the outer sides of the rotating rollers (16). A conveying motor (18) is installed on one side of the support frame (1). One end of the rotating shaft (15) is in cooperative connection with the output end of the conveying motor (18). Among them, the bottom side of the limiting roller (8) is in contact with the conveyor belt (17) but not connected.

3. The flatness detection device for an LED display screen according to claim 2, wherein: An installation frame (19) is installed on the top side of the support frame (1). A cylinder (20) is installed on the top side of the installation frame (19). A support plate (21) is installed on the bottom side of the cylinder (20). A number of groups of detection components are installed equidistantly on the bottom side of the support plate (21).

4. An LED display flatness detection device according to claim 3, characterized in that: The detection component includes a number of sleeves (22), and the sleeves (22) are all installed on the bottom side of the support plate (21). A first pressure sensor (23) and a second pressure sensor (24) are respectively installed on the inner walls of the top side and the bottom side of the sleeve (22). Among them, the second pressure sensor (24) is annular. A movable rod (25) is movably installed through the second pressure sensor (24) at the bottom side of the sleeve (22). A connecting block (26) is installed on the top side of the movable rod (25). Both the first pressure sensor (23) and the second pressure sensor (24) are used to monitor whether the connecting block (26) generates pressure on the first pressure sensor (23) and the second pressure sensor (24). An installation seat (27) is installed on the bottom side of the movable rod (25). A detection wheel (28) is installed inside the installation seat (27) by means of a pin shaft. A second spring (29) is fixedly connected between the installation seat (27) and the sleeve (22). The second spring (29) is sleeved on the outer wall of the movable rod (25). A number of warning lights (30) that are matched with the detection component are equidistantly installed on one side of the support plate (21). The detection wheel (28) is made of hollow rubber material, and the elastic coefficient of the second spring (29) is large.

5. The flatness detection device for an LED display screen according to claim 4, wherein: The outer arc surface of the electrode plate (14) is tangent to the outer arc surface of the electrode piece (11), and the length of the electrode piece (11) is much smaller than the length of the electrode plate (14).

6. The flatness detection device for an LED display screen according to claim 5, wherein: A control panel (31) is installed on one side of the support frame (1). The control panel (31) is electrically connected to the electrode piece (11), the electrode plate (14), the servo motor (3), the first pressure sensor (23), the second pressure sensor (24), and the warning light (30). Among them, it is used for signal transmission of the electrode piece (11), the electrode plate (14), the first pressure sensor (23), and the second pressure sensor (24), as well as operation control of the servo motor (3) and the warning light (30).

Images